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(o Model.) 2 Sheets-Sheet 2. A. SHATTUGK 8u C. THORN, Jr.

ADDING MACHINE.

No. 268,135. Patented Nov. 28. 1882.

Fig., ,9.

PATENT A OFFICE.

ARTHUR SHATTUCK AND CHARLES THCRN, dlt., 0F SANTA ROSA, UAL.

ADDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 268,135, dated November28, 18B?.

Application tiled May 27, 1882. (No model.)

.To all whom it may concern:

Beit known that we, ARTHUR SHATTUGK and CHARLES TI-IORN, Jr., of SantaRosa, county of Sonoma, State of California, have invented an ImprovedAdding-Machine; and we hereby declare the following to be a full, clear,and exact description thereof.

Our invention relates to an improved device or apparatus formechanically adding columns of gures; audit consists in certain detailsof construction, as hereinafter fully described, and specificallypointed out in the claims. The upper ends of these belts or slides eachpass over a roller, also having the digits imprinted upon them andarranged on a shaft, so that as a slide or belt is drawn over the tableany number of ijgures the roller will also be revolved a correspondingnumber. Suitable devices are connected with the rollers to cause eachroller to the left to be moved to indicate any addition to the columnsot' tens, hundreds, thousands, Snc., and suitable mechanism is connectedwith the rollers by which they are properly rotated and prevented fromturning too far, and by which any or all of the rollers may be returnedto 0 at will, as will be more fully explained by reference to theaccompanying drawings, in which-- Figure l, Sheet 1, is a perspectiveview ot our apparatus, Fig. 2, Sheet 2, is a plan with chains omitted.Fig. 3 is a vertical longitudinal section. Figs. 4 and 5 are detailedviews of parts of the apparatus. Fig. 6 is a detail showing leverdisengaged. Fig. 7 shows the pawl-levers in section and thedisengaging-bar in elevation.

A is the table of our apparatus, having at each end a transverse shaft,with a series of rollers, B and C, upon them, over which a series ofindependent slides, chains, or open belts, D, pass, as shown. Upon thetable, beneath each chain, is a row of igures, from 1 to 9, so spacedthat each figure occupies the open space of one link ot' the chain. Therollers C at the lower end ofthe table are idlers, around which thechains pass and are kept in the proper place and at the proper tension.The rollers B at the upper end are of such a size as to have digitscorresponding with those upon the table, (marked upon spaces from 0 to9,) so that when the chain is drawn down over the table to the stop D atthelower end from any particular tigure the roller will be turned acorresponding number of tigures. Then any roller passes the 0 point themechanism will move the roller to the left one place, in the mannerusual to this class of machines. Each roller has upon its side aratchet-wheel, E, which is engaged by a pin, F, on the end of a lever,G. This lever has secured to it one arm ofabell-crank lever, H, havingits fulcrum at I. The opposite end ot' this lever H has a curved arm, J,projecting up from it toward the central shaft, so that the pin K uponthe next roller to the right willstrike it when the() has arrived at thetop, and will move it down, so that through the levers G and H theratchet E will be moved forward one tooth, and the roller t'o which itis attached will be moved a corresponding distance, or one ligure, uponits face. Around the periphery of the roller are a series of arms, L,which project inward radially toward the center, and as the end of thelever H and the curved arm J are forced down they will engage a pin, a.,on the bottom of the arm J, acting as a stop, and thus prevent theroller from moving more than one iigurc at a time. When relieved fromthe pressure ofthe pin K the hell-crank lever H and the leverarm G arereturned to their original position, ready for a new impulse by thespring M. Then it is desired to move any one of the rollers back to 0,it is done by pressing a button or knob, N, at one side. This knob isattached to a bar, l, having inclined notches upon one edge, like theteeth of a saw, as shown, and each of these notches operates upon thecorresponding lever, Gr,ot' its roller, so that when the har P is movedit throws the lever G up midway between the ratchetwheel E and the armsL. rlhe arm J will stand in its normal position between the arms L andthe center, and thus allow the roller to be turned back to 0, or untilthe pin ofthe next roller strikes the inside of the curved arm J.

Having thus described our invention, what we claim as new, and desire tosecure by Let ters Patent, is

1. In an adding-machine, and in combination with the stationary table A,with the rows of figures and the traveling chains, as shown, the rollersB, having the ratchet-wheels E and radial arms L, the levers G and H,connected by spring M, and the curved arms J and the IOO 2 26ers?,

allow them to be turned freely, substantially as herein described.

In witness Whereot1 we hereunto set our hands.

ARTHUR SHATTUGK. UHAS. THORN, JR. y Witnesses:

JNO. T. CAMPBELL, S. H. NoUnsn.

